Author
- Humphrey Wellys1
- Ibn Abi Zayd al-Qayrawani1
- Ibn al-Ḥājib1
- Isabella I of Castile1
- Jacobo Bellenden1
- Jaghmini1
- Jean de Bernuy1
- Jerónimo Román y Zamora1
- Joan Martines1
- Joanna of Austria, Princess of Portugal1
- Johann Neudörffer the Elder1
- Johannes Leonis1
- John Bale1
- John Gage1
- João Freire1
- Juan Baptista de Gatica1
- Juan Gallo1
- Juan Martínez Silíceo1
- Juan Perez Barahona1
- Juan de Foxá1